We are already geoengineering the planet by pumping CO2 into the atmosphere to raise the temperature and by cutting down and burning trillions of trees to make farmland plus a lot of other ways. ​It’s a dangerous practise that could be going to bring a lot of problems for humanity but here is one that might help farmers and is something to think about.

Australia is a country with a very flat and barren interior and I have often speculated what it would have been like If it had a range of mountains right down the middle, which would have created rain clouds to feed rivers and make the centre fertile and probably cooler. Constructing a wall high enough to do the same thing as a mountain is not an option but we could use a different technology.

The Spanish have been researching hot air thermal generators to make electricity and one of the side effects is that there has been noticed a downwind tear drop area of green growth. This is caused by the hot air rising from the chimney and pushing some moisture into the upper atmosphere where the moisture condenses and falls as rain.

If a line of big thermal chimneys were constructed and placed in a line down route A71 between Charleville and Bourke it would be close enough to the grid to take away the electricity and, in a farming region which is on the brink of productivity due to a lack of rainfall moisture, it could increase farming productivity substantially.​These chimneys are not wildly expensive to build and make cheap electricity but the real benefit would be to farming where even a small increase in rainfall would be a huge benefit. Instead of destroying farmland by digging coal, which is a diminishing energy source, and spending a billion dollars on a railway which would only be for coal movement the Queensland government would do better by looking at alternative investments.It needs some research into its effect into the upper atmosphere but it could work.

CO2 in the atmosphere is increasing at an accelerating rate despite the knowledge and advise to governments that this is a ruinous policy. At over 405 parts per million we are faced with sea level rise of 12 metres and a temperature rise of 2C or more and when this starts to hurt the population hard decisions will have to be made.The and IPCC have already set out some suggestions which are, cease burning fossil fuels, adopt a human diet and farming regime with minimum cattle and start to remove CO2 from the atmosphere. Statements that are easily made but politically difficult and yet this is what we will have to do eventually.In New Zealand, we burn hardly any coal for making electricity but our two big greenhouse gas emitting areas are transport and farming. If we accept that electric transport is imminent and will replace oil powered cars in ten or twenty years’ time then we have to look at our farming activities and also try to work out how to remove CO2 from the atmosphere. Both very difficult decisions for different reasons, cattle and sheep farming are central to the New Zealand economy and we do not currently have the technology to remove CO2 from the atmosphere and will have to rely on natural solutions.While driving in remote farming regions near Taranaki and Whanganui I was struck by the way that our early farmers denuded the countryside of trees by logging and burning to convert the bush into land suitable for sheep and cattle.

This is a fairly typical country scene and shows the lack of trees and the soil erosion. Sheep (and cattle) eat every green plant and trees can not grow back while they are on the land.

This shows areas where sheep are not on the land and the trees have grown back to restore the natural bush.My argument is that many areas of sheep farming are barely economic and it would make sense to put that land into retirement, as they do in Europe, by paying the farmers not to farm and regenerating the land with native trees that are not going to be felled.This is not a modest undertaking and we will be desperate when we start it. We are burning 3,800 million tonnes of coal A YEAR, and it is 80% carbon so you can imagine how much CO2 is in the atmosphere (oil is additionally a similar figure).It takes 40 trees to absorb a tonne of carbon so the scale of it is immense but as we are already in a dire situation, which is quickly getting worse and natural disasters, caused by the planets rising temperatures, will force the politicians to start listening to the scientists and the people and not vested interests who want to continue with ‘business as usual’